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Finding the Third Proportional to 2,940 and 4,680

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Solution

The third proportional to 2,940 and 4,680 is: 7,449.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,940 : 4,680 = 4,680 : x
  2. Step 2: Convert to fraction form
    2,940/4,680 = 4,680/x
  3. Step 3: Cross multiply
    2,940x = 4,680 × 4,680
  4. Step 4: Simplify right side
    2,940x = 21,902,400
  5. Step 5: Solve for x
    x = 21,902,400/2,940
  6. Step 6: Final answer
    x = 7,449.80

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Why These Related Problems?

These problems maintain the same ratio (1.59) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.